Stefan Heindorf

Learn More
We report on the construction of the Wikidata Vandalism Corpus WDVC-2015, the first corpus for vandalism in knowledge bases. Our corpus is based on the entire revision history of Wikidata, the knowledge base underlying Wikipedia. Among Wikidata's 24 million manual revisions, we have identified more than 100,000 cases of vandalism. An in-depth corpus(More)
Wikidata is the new, large-scale knowledge base of the Wikimedia Foundation. Its knowledge is increasingly used within Wikipedia itself and various other kinds of information systems, imposing high demands on its integrity. Wikidata can be edited by anyone and, unfortunately, it frequently gets vandalized, exposing all information systems using it to the(More)
XML has become the de facto standard for data exchange in enterprise information systems. But whenever XML data is stored or processed, e.g. in form of a DOM tree representation, the XML markup causes a huge blow-up of the memory consumption compared to the data, i.e., text and attribute values, contained in the XML document. In this paper, we present an(More)
  • 1